Improved steam-drill



-n'iay'be v .4 l

nf." v' llotlie' lower end .ofthe hollow shaft is fastened, 'so as to it, a gear-wheel, j, and tween this scia gime-5 @mi vfait.

G. F. Vonsn, on wnmson, VERMONT, Assleivon 'ro'H'IMsELF 'AND "rnn MANUFACTURINGUOMPANY, 0F SAME PLACE.

Wnmson Lam-s Pam: No. 36,903, am@ Femm 1c,1ec9. l

mrnovnn sans,AM-:mussv n schedule-referred so mums meer; Pasan: am; mung pm. nu um.

TQ all whom it 'may concern:

Be it known that I, G. F. CASE, of Windso'fr, in theA county of Windsor, and State ff Vermont, have in? vented certain new and useful Improvements in Steam? Drilling Machines; and that the following-is afull,

clear, and exact description of the saine, reference being had to the accompanying drawings, making a part of this specification, in which- Eigurelrepresents an elevation of the machine;

Figure 2 represents a vertical central section through thesame; and v Figure 3 represents a top plan,.with the cover or head removed to show the interior.

Similar letters of reference, where they occur in d he several separate figures, dnote like parts in all of the drawings.

My invention relates tothe operatlon'of a "diam'ond p pointd1iH, actuated through the powerof steam, by

being connected directly with the engine,`as will be. explained.

To enable others skilled in the art to'make and use my invention, I will proceed to describe .the same with reference tothe drawings. s

A`repiesents a steam-cylinder or case, within which runs a steam-wheel, B, operated or driven by steam,A

admitted against the pistons (t c c, `in the usual wellknown wayof driving rotary steam-engines.

The steam is admitted tothe pistons o r steam-wheel vby means 'of atwoway plug-cockat b, and thence through steam-passages c, in dotted lines, iig. 3, which have two Qpeni'ngs into the steam-chamber, one at d,

' and the other ate, so that there shall he steam and lthe steam-wheel must have a centre to run upon, as a' shaft or journals, I nsea hollowfshaft, and with thisl hollow shaft, which is rotated by steainfl' connect my.

drilling-mechanism, as follows.: Through the hollowshaft g, I pass" a-drill-shait, C, there being'a groote, h, cutlongitudmally of said shaft, into which studs t c', in the hollow shaft g, pass, so that whilst the drill-shaft must revolve with the hollow shaft, itmay slide through the shaft, up or down, as the case described.

gearfwheel and the under side of the case or lower head of the stearn-cylindei'-A, is a series of balls, 1, to relieve the pressure and friction of said gearluipon the case, by the resistance on the drill.

' This gear j works intoand turns a gear, k, on the stud Z',- and upon the'hub m, ofthe gear 15,is placed' another gear, n, which is pressed up-'against a rubber spring, c, placed between -the'two gears, and -by which pressure the gear n may turn with the one, k, until the .resistance becomes -too great o rlexeessive, and thenthe gear n will siipon or against the elastic ring.

The object of this connection is .to regulate the feed ing up ofthe drill to the stone, and to compensate for the dicrence in the hardness'or otherwise of the stone A nut, p,below the gear n, regulates it and its pressvv"ure against the ring aand the gear k.

The. gear n. works into and' turns a nut-gear Wheel,y

o, the turning of which, through its screw-nut r, feeds upthe drill, by or through the screwthreads on the drill-shalt C.:

The drill s, I propose to use, is what istermed the diamondpoint drill. Of the rotary engine it may be lnecessary to mention that shoes, 2, are placed on the ends of the pistons, so

that they may .adapt themselves to the interior of the cylinder, against which theyy run.

On top c? .the wheel', and between it and the upper. head of the steam-ease A,4is placed angular or bevelled packing, 3,the shape of which is shown in iig.- 2.1

At the centre of the steaniwheel there is a spring-V ring, t, which tends to press all the pistons out against the steam-cylinder` or case, and the forcing ofthe spring l by o ne of the pistons sliding toward the centre ofthe wheel, acts to push out the other pistons against the cylinder.

Having thus fully described my invention,

What Iclaim therein-as new, and deshe to sefurev by Letters Patent, .is-f

In combination with the lower head of the cylinder A', the gear-wheel j, and a drillrod,having rotary motion, the balls, when interposed to relievefriction, in the-mannerdescribed, or its equivalent. v

Also, in combination with the gear k, the gear fn, held thereto by friction against-an velastic ring, o, interposed and regulated' so as to slip when-excessive strain comes upon the gear n, as and for the purpose lGf. F. OASE.

i Witnessesz.

L. W. HAwLnr, W. T. SMITH. 

